> Construction for OPzV Tubular Gel BatteryPositive Plates：Robust tubular plates consisting of Pb-Ca-Sn alloy, optimized for high corrosion resistance, offer an extreme high cycling expectancy；Negative Plates: Grid plate construction consisting of lead calcium alloy；Separator: Microporous and robust PVC-SiO2 separator, for positive and negative plates and optmized for low internal resistance；Container: ABS (UL94-HB), Flammability resistance of UL94-V1 can be available upon request；Terminal Poles: Screw connection for easy and safe assembly and maintenance-free connection with excellent conductivity；Valves: Release gas in case of excess pressure and protects the cell against atmosphere, reasonable open and close valve pressure, high reliable on performance.